摘要
通过对垂榆秋季叶片营养元素的测定，从营养特性出发，应用诊断综合法（DRIS）对垂榆进行营养诊断，建立了垂榆叶片DRIS参比值，为指导日后垂榆营养诊断提供理论基础。
Based on the early autumn leaf nutrition determination, DRIS method was used on Ulmus pumila var. pendula, the DRIS parameters of NPK was established, according to long term development normal, it will definitely improve the reasonableness ratio and effectiveness nutrition diagnosis.
